Secondary AIR System Incorrect Airflow Detected *

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Trouble Ticket Help Requests for DTC P0411

Help Request

Posted

1999 Audi A4 Quattro 2.8L Excessive Emissions, MIL Lamp onVIN: WAUED28D7XP0411: Secondary aire injection incorrect flow. Vehicle came in with P0411 secondary air flow incorrect.
Had some failing vacuum lines so those and the vacuum
solenoid were replaced. 6 weeks later the code came back
and the combi valves were replaced. The air pump can be
turned on manually and it appears to...

1999 Audi A4 Quattro 2.8L Excessive Emissions, MIL Lamp onVIN: WAUED28D7XP0411: Secondary aire injection incorrect flow. Vehicle came in with P0411 secondary air flow incorrect.
Had some failing vacuum lines so those and the vacuum
solenoid were replaced. 6 weeks later the code came back
and the combi valves were replaced. The air pump can be
turned on manually and it appears to...